5-10
Figure 5-9.—Mobile 30-foot tropospheric-scanner antenna.
Both of these systems are used ashore. You're now going to get a look at a shipboard data
information exchange system.
Q1. What is a dummy load?
Q2. What is the function of a product detector?
Q3. What is the frequency range of the mf band?
Q4. Microwave systems use what portion of the atmosphere?
Q5. What is the voice channel capacity of an los communications system?
Q6. What is the one-hop transmission range of a tropospheric-scatter system?
NAVAL TACTICAL DATA SYSTEM
In recent years, the Navy has introduced several new highly technical and effective combat weapons
systems. However, these weapons systems did not solve the basic combat command problems that
confront our Navy. In combat, a fleet continues to be involved in close-range offense and defense. During
close-range combat, the shipboard combat information center (CIC) is involved in complex tactical
situations. These situations require intelligent and highly important decisions. Each decision has to be
made in a short period of time. You will find the speed at which these combat situations must be solved is
inconceivable to someone thinking in terms of typical CIC operations of the recent past. Therefore, the
NTDS was developed by the U.S. Navy as a command tool for commanders in tactical combat situations.
Objectives
The naval tactical data system (NTDS) is based on the interaction of humans and machines. The
NTDS helps coordinate fleet air defense, antisubmarine warfare, and surface defense operations. Through
